protected void Page_Load(object sender, EventArgs e)
    {
        string    id  = Request.QueryString["selectclientid"];
        ClientDal dal = new ClientDal();
        DataSet   ds  = dal.SelectById(id);
        DataTable dt  = ds.Tables[0];

        Class.Text    = dt.Rows[0][1].ToString();
        Serial.Text   = dt.Rows[0][2].ToString();
        Client.Text   = dt.Rows[0][3].ToString();
        Tel.Text      = dt.Rows[0][4].ToString();
        Tel2.Text     = dt.Rows[0][5].ToString();
        Country.Text  = dt.Rows[0][6].ToString();
        Province.Text = dt.Rows[0][7].ToString();
        City.Text     = dt.Rows[0][8].ToString();
        Addr.Text     = dt.Rows[0][9].ToString();
        Email.Text    = dt.Rows[0][10].ToString();
        UserName.Text = dt.Rows[0][11].ToString();
        Passwd.Text   = dt.Rows[0][12].ToString();
    }